Important Information; Grp, Prp, And Line Card Memory Overview - Cisco 12000 Series Replacement Instructions Manual

Important Information

Important Information
For Cisco 12000 Series Router route processor (RP) and line card removal and installation information,
refer to the installation and configuration publication for the hardware in use.

GRP, PRP, and Line Card Memory Overview

This section provides an overview of the memory systems on the GRP, PRP, and Cisco 12000 Series
Internet Router line cards.
GRP Memory
The GRP uses the following types of memory (see
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Note
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PRP Memory
The PRP uses the following types of memory. (See
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Cisco 12000 Series Router Memory Replacement Instructions
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Route memory—Dynamic random access memory (DRAM) enables an onboard processor to run
Cisco IOS software and store network routing tables. You can configure route memory from the
factory default of 128 MB to the maximum configuration of 512 MB.
GRP route memory configurations of 512 MB are only compatible with Product Number
GRP-B=. Cisco IOS Release 12.0(19)S or 12.0(19)ST or later, and ROMMON Release 11.2
(181) or later, are also required.
GRP Flash memory—Single in-line memory module (SIMM) stores the boot helper software that
enables you to boot the router when a valid Cisco IOS software image is not available on a Flash
memory card.
GRP linear Flash memory card—A convenient, offline medium for storing a copy of the default
Cisco IOS software image. This card can be inserted into either of the two Flash memory slots on
the GRP, so that you can load router software into GRP main memory.
GRP erasable programmable read-only memory (EPROM)—Contains a ROM monitor that enables
you to boot the default Cisco IOS software image from a Flash memory card if the Flash memory
SIMM does not contain a boot helper image.
GRP Random access memory—Nonvolatile random-access memory (NVRAM) provides a stable
medium for storing the router's configuration files, the environmental monitoring logs, and the
contents of the router's virtual configuration register.
Route memory—Synchronous dynamic random access memory (SDRAM) enables an onboard
processor to run Cisco IOS software and store network routing tables. You can configure route
memory from the factory default of 512 MB to the maximum configuration of 2 GB.
PRP onboard Flash memory—Single in-line memory module (SIMM) stores the boot helper
software to boot the router when a valid Cisco IOS software image is not available on a Flash disk
or a linear Flash memory card.
Figure 1 on page 4 for memory locations):
Figure 2 on page 6 for memory locations):
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